The nurse is caring for a patient with major depressive disorder. The nurse recognizes which sign/symptom supports the diagnosis of depression?

The 24-year-old otherwise healthy patient with bipolar disorder is found unconscious and brought to the emergency department. The patient is mildly febrile, significantly tachycardic, tachypneic, and hypotensive, with poor skin turgor and 5 second capillary refill. The patient’s EKG is notable for inverted T waves and sinus tachycardia. Which orders does the nurse anticipate for this patient? Select all that apply.  

The nurse is providing education to the patient newly diagnosed with major depressive disorder. The nurse includes information on which derangement of neurotransmitters?